PRO-PAK
13
3. Close the cylinder valve and
monitor the pressure gauge for one
minute. If the reading falls by more than
10 bar during this time there is an
unacceptable leak.
4. If the system fails the leak test:
close the cylinder valve, vent air from the
system by opening the DV bypass. Check
all pneumatic connections and repeat the
leak test.
5. DO NOT USE apparatus that leaks
excessively. Attach an explanatory note
and return the apparatus for service.
3.7 DV AND FACEMASK
3.7.1 All Facemasks
1. Check that the facemask is clean
and undamaged.
2. Check that the orange O-ring on
the DV outlet is clean and in good
condition.
3. Fit the DV to the facemask and
check that the red locking catch engages
fully. Twist the DV gently to confirm that it
has.
4. Fully open the cylinder valve.
3.7.2 Facemasks with a Web
Harness
1. Hold the head-harness lower
straps, place chin in chin-cup and pull
straps over back of head, brushing back
hair from under face-seal.
2. Tighten harness straps in
sequence: Bottom, Middle, Top. DO
NOT over-tighten.
3. Inhale deeply and check that the
DV first breath mechanism operates.
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